dlclose
- 所属头文件:
dlfcn.h - 语法定义
int dlclose(void* handle);
man page = help
DLCLOSE(3) BSD Library Functions Manual DLCLOSE(3)
NAME
dlclose -- close a dynamic library or bundle
SYNOPSIS
#include <dlfcn.h>
int
dlclose(void* handle);
DESCRIPTION
dlclose() releases a reference to the dynamic library or bundle refer-enced referenced
enced by handle. If the reference count drops to 0, the bundle is
removed from the address space, and handle is rendered invalid. Just
before removing a dynamic library or bundle in this way, any termination
routines in it are called. handle is the value returned by a previous
call to dlopen.
Prior to Mac OS X 10.5, only bundles could be unloaded. Starting in Mac
OS X 10.5, dynamic libraries may also be unloaded. There are a couple of
cases in which a dynamic library will never be unloaded: 1) the main exe-cutable executable
cutable links against it, 2) An API that does not supoort unloading (e.g.
NSAddImage()) was used to load it or some other dynnamic library that
depends on it, 3) the dynamic library is in dyld's shared cache.
RETURN VALUES
If dlclose() is successful, it returns a value of 0. Otherwise it
returns -1, and sets an error string that can be retrived with dlerror().
SEE ALSO
dlopen(3) dlsym(3) dlerror(3) dyld(3) ld(1) cc(1)
Nov 6, 2006
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